this is my Select all Checkboxes in Fieldset.. this code is working in Firefox not in Internet Explorer can anybody help me out?

$('#PbtnSelectAll').click(function() {
            $('#PricingEditExceptions input[type=checkbox]').attr('checked', 'checked');
            $('#PbtnSubmit').show();
            $('#PbtnCancel').show();
            $('fieldset').find("input:not(:checkbox),select,textarea").attr('disabled', 'disabled');
            $('#genericfieldset').find("input,select,textarea").removeAttr('disabled');

        });

thanks